KCNA Cloud Native Application Delivery Practice Question
During a canary deployment using Argo Rollouts, how does the tool determine the success of the canary before promoting it?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
By analyzing predefined metrics (e.g., error rate) via an AnalysisTemplate
Argo Rollouts uses metrics from a service mesh or monitoring to analyze the canary's health and decide whether to proceed.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
By checking the rollout's status field in the YAML
Why it's wrong here
Status is updated based on analysis, but the analysis itself uses metrics.
- ✗
By requiring manual approval via a webhook
Why it's wrong here
Manual approval is optional, not the primary mechanism.
- ✗
By comparing the ReplicaSet's age to a threshold
Why it's wrong here
Age is not a health indicator.
- ✓
By analyzing predefined metrics (e.g., error rate) via an AnalysisTemplate
Why this is correct
AnalysisTemplate runs metric queries and determines success/failure.
Go deeper
Related to this question
Learn chapter
Observability: Monitoring, Logging, and Tracing
Key term
Service Mesh
A service mesh is a dedicated infrastructure layer that manages communication between microservices, handling tasks like service discovery, load balancing, encryption, and observability without requiring changes to application code.
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Same concept, more angles
1 more way this is tested on KCNA
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A team uses Argo Rollouts for progressive delivery. They configure a canary rollout with a traffic split of 20% to the new version. After verification, the rollout automatically increases traffic to 100%. Which Argo Rollout manifest field controls this gradual traffic increase?
hard- A.strategy.canary.trafficRouting
- ✓ B.strategy.canary.steps
- C.template.spec.containers
- D.spec.replicas
Why B: The steps field in an Argo Rollout defines the sequence of canary steps, including traffic percentages. Option B (strategy.canary.steps) is correct. Option A (strategy.canary.trafficRouting) configures how traffic routing is done (e.g., with a service mesh). Option C (spec.replicas) sets the total replicas. Option D (template.spec.containers) defines containers.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This KCNA practice question is part of Courseiva's free CNCF certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the KCNA exam.